Tubular burner jacket



June 10, 1930. E. o. ENGELS TUBifLAR BURNER JACKET Filed Nov. 4, 1929 Burner Tale L if.

INVENTOR V OSCAR ENGFL S ZUGE inbakeovensfi a a 1 v e i The invention isi'ound in a new and usei ful construction andniode of operation ofthe heat-radiating jackets that surround and ent i a close the burner: The jacket is tubular and commonly has two legs, one containing the i0 nets of coinbustion to prevent their mixin with the oven atmosphere. When installe "in anqovensuch a heating jacketprojects through asidefwalhand across. the baking chamber;

wherein itis highly mportant a, maintain dependable combustion atthe burners under 1 control of heat intensity and 1 distribution throughout the bakingchamber. j e a \ThemQst; serious diificulty was the danger the jacket happened tobe filledwith' explosive i t r y t the time the ignition was turned endmt the burner "and, traveling the length mum explosivepressure near the exhaust end f thej 8 chereg nether:ldifliculty has been a pei'sistent tendeney of tlle flalneto hurn erraticallyevi W denced. =at-ti1nesby a inufiled popping sound caused byslnall explosionsfofgas in the tu I bular jacket. Thecausehas been foundto be 'nherent in the design of the tubular jacket,

aswillbe explainedlater. f 3 a A further difliculty qwas the tendency to unduly heatthatpart ofthe baking chamber space remote fronrthe; intake end of the burner; The causeof thatuneven heating effect wasalsoin-herent {in the design of the tubularjacket as heretofore constructed.

. Theobject ofmyinvention is to overcome the difl'iculties referred to by providing a: jacket so constructedthat majorand minor explosionsin thejacket can not occur an d uniformheating of the baking chamber s attained.""

" N S T .Thisinvention relates to heating units of lthettubular gase burner type connnonly used a burner, the other conductingaway the prodi5 Seriousinherent diificultieshaveattended the useof sueh heating. units in bakers ovens;

all "conditions of use and to haveco nplete of violent gas {explosions in the jacket. If

;f on, explosion wavesiweresetupat the intake ofbothlegs of tliejacket, attained a maxiaclzet; frequently rupturing the j acket EUeEnE oscAnnNGEts oF sAeInAw, nicnieangfass encn Tb BAK R rnnigms 1 i CQMIBANY,-INC;, 0F SAGINAW MICHIGAN, A CORPORATION or nEW YoRK UBULAR BURNER JACKET Y Application med November .4, 192a swarm. 404,693. 1

PATENT E: a

With the foregoing and certain other ob jects in view, which will appearlater in the specification the invention comprises the de claimed and the eqtnva vices described and lents thereof.

- Inthewd rawings l is a-planviewiot a burner and-tubularja'cket equipped With the devices that constitutethe invention.

Fig. 2 is a part sectional detail of the plate that holds the two ends of the tubular jacket imposition.

Fig. 3 is a transverse section ontheline of Fig.2. it i i a Fig. 4 is a detail of a modifiedfor p a connection between theburner leg andthe exhaust leg of thetubular jacket.

Fig-5 is a sectional viewon the line ofFigQl, showing the" burner tube in place.

rangeinents of the connecting pipes. i i As is clearly shown in the drawings, with;

in one leg A ofthe tubular jacket is enclosed the usual tubular burner B equipped with gas nected together in any suitable manner, as by a: terminal plate E; i

a Figs. 6, 7 andS are details of modified ar- In my invention a number of small pipes 3 are connected to 1 leg A of the tubular jacket as at 1, suitablyspacing them along length. The other ends of tubes 3 are connected, as at 2, with thespent gas enhaust leg D, thus providing individual-conduits"to deliver hot gases that aie generated at differ} ent places along the length of the burner B directly into theexhaustleg D of thejacket. Preferably the inletsl of tubes 3 are located idstaggered relation with the outlets 2 as shown,in order thatthe pipes 3may be made of \ogeeor other suitably; "curved formand sufiiciently flexible toadapttheniselves to unequal lengthwise expansion of the two legs Aand D ofthe jacket; alsotoacco1nmodate any displacement of the legs A and D sidewise with respectto each other without straining thein: Better eombustionresults are at tained whenthe tubular jacket leg is sub stantially elliptical in cross section, as shown in Fig. 3, theburner tube B be ng located near in theleg containing the burner is of elliptical cross-sectional shape, the tubular burner located at oneside thereof and having its a burner orifices directed along the major axis 5 of the ellipse, for the purposes set forth.

7 A structure as setforth in claim 5 Wherein thesaid gas conduits are made'of flexible pipes bent to curvilinear form, for the purv-poses set forth. i i

10 8. In combination, a jacket comprising tuvbular intake and exhaust legs arranged side byside and spaced apart, a burner within said intake leg, and gas conduits connecting said legs and situated at intervals along the length thereof, for the purposes set forth.

In testimony whereof I af'fix my signature. EUGENE OSCAR ENGELS. 

